Canadian Patents Database / Patent 2961783 Summary

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(12) Patent Application: (11) CA 2961783
(54) English Title: SYNTHETIC ACID COMPOSITIONS ALTERNATIVES TO CONVENTIONAL ACIDS FOR USE IN THE OIL AND GAS INDUSTRY
(54) French Title: COMPOSITIONS D'ACIDES SYNTHETIQUES UTILISABLES COMME SUBSTITUTS D'ACIDES CLASSIQUES DANS L'INDUSTRIE PETROLIERE ET GAZIERE
(51) International Patent Classification (IPC):
  • C09K 8/72 (2006.01)
  • C09K 8/528 (2006.01)
  • C23F 15/00 (2006.01)
(72) Inventors (Country):
  • PURDY, CLAY (Canada)
  • THATCHER, DARREN (Canada)
  • GARNER, JOHN (Canada)
  • ULMER, BRUCE (Canada)
(73) Owners (Country):
  • FLUID ENERGY GROUP LTD. (Canada)
(71) Applicants (Country):
  • FLUID ENERGY GROUP LTD. (Canada)
(74) Agent: BURNET, DUCKWORTH & PALMER LLP
(45) Issued:
(86) PCT Filing Date: 2015-09-29
(87) PCT Publication Date: 2016-04-07
Examination requested: 2017-03-20
(30) Availability of licence: N/A
(30) Language of filing: English

(30) Application Priority Data:
Application No. Country Date
2,866,521 Canada 2014-10-02

English Abstract

A synthetic acid composition for use in oil industry activities, said composition comprising: urea and hydrogen chloride in a molar ratio of not less than 0.1 : 1 and formic acid or a derivative thereof.


French Abstract

L'invention concerne une composition d'acides synthétiques utilisable dans des activités de l'industrie pétrolière, qui comprend: de l'urée et du chlorure d'hydrogène selon un rapport molaire d'au moins 0,1:1; et de l'acide formique ou un dérivé de celui-ci.


Note: Claims are shown in the official language in which they were submitted.


CLAIMS

1 . A synthetic acid composition for use in oil industry activities, said
composition
comprising: - urea and hydrogen chloride in a molar ratio of not less than
0.1:1; and
- formic acid or a derivative thereof.
2. The synthetic acid composition according to claim 1, wherein the formic
acid or a
derivative thereof is selected from the group consisting of: formic acid,
acetic acid, ethylformate
and butyl formate.
3. The synthetic acid composition according to claim 1 or 2, wherein the
formic acid or a
derivative thereof is present in an amount ranging from 0.05 - 2.0 %.
4. The synthetic acid composition according to claim 3, wherein the formic
acid or a
derivative thereof is present in an amount of approximately 0.1%.
5. The synthetic acid composition according to any one of claims 1 to 4,
wherein the urea
and hydrogen chloride are in a molar ratio of not less than 0.5:1.
6. The synthetic acid composition according to claim 5, wherein the urea
and hydrogen
chloride are in a molar ratio of not less than 1.0:1.
7. The synthetic acid composition according to any one of claims 1 to 6,
further comprising
a phosphonic acid derivative.
8. The synthetic acid composition according to claim 7, wherein the
phosphonic acid
derivative is aminoalkylphosphonic salt.
9. The synthetic acid composition according to claim 8, wherein the
aminoalkylphosphonic
salt is amino tris methylene phosphonic acid.
10. The synthetic acid composition according to any one of claims 1 to 9,
further comprising
a metal iodide or iodate selected from the group consisting of: potassium
iodide, sodium iodide,
cuprous iodide and lithium iodide.

-14-


11. The synthetic acid composition according to claim 10, wherein the metal
iodide or iodate
is cuprous iodide.
12. The synthetic acid composition according claim 10, wherein the metal
iodide or iodate is
potassium iodide.
13. The synthetic acid composition according claim 10, wherein the metal
iodide or iodate is
sodium iodide.
14. The synthetic acid composition according claim 10, wherein the metal
iodide or iodate is
lithium iodide.
15. The synthetic acid composition according to any one of claims 1 to 14,
further
comprising an alcohol or derivative thereof.
16. The synthetic acid composition according to claim 15, wherein the
alcohol or derivative
thereof is an alkynyl alcohol or derivative thereof.
17. The synthetic acid composition according to claim 16, wherein the
alkynyl alcohol or
derivative thereof is propargyl alcohol or a derivative thereof.
18. The synthetic acid composition according to claim 8, wherein the
aminoalkylphosphonic
salt is present in a concentration ranging from 0.25 to 1.0% w/w.
19. The synthetic acid composition according to claim 18, wherein the
aminoalkylphosphonic salt is present in a concentration of 0.5% w/w.
20. The synthetic acid composition according to claim 16 wherein the
alkynyl alcohol or
derivative thereof is present in a concentration ranging from 0.01 to 0.25%
w/w.
21. The synthetic acid composition according to claim 20, wherein the
alkynyl alcohol or
derivative thereof is present in a concentration of 0.1% w/w.

-15-


22. The synthetic acid composition according to any one of claims 10 to 14,
wherein the
metal iodide is present in a concentration ranging from 100 to 1000 ppm.
23. The use of a synthetic acid composition according to any one of claims
1 to 22 in the oil
industry to stimulate formations.
24. The use of a synthetic acid composition according to any one of claims
1 to 22 in the oil
industry to assist in reducing breakdown pressures during downhole pumping
operations.
25. The use of a synthetic acid composition according to any one of claims
1 to 22 in the oil
industry to treat wellbore filter cake post drilling operations.
26. The use of a synthetic acid composition according to any one of claims
1 to 22 in the oil
industry to assist in freeing stuck pipe.
27. The use of a synthetic acid composition according to any one of claims
1 to 22 in the oil
industry to descale pipelines and/or production wells.
28. The use of a synthetic acid composition according to any one of claims
1 to 22 in the oil
industry to increase injectivity of injection wells.
29. The use of a synthetic acid composition according to any one of claims
1 to 22 in the oil
industry to lower the pll of fluids.
30. The use of a synthetic acid composition according to any one of claims
1 to 22 in the oil
industry to remove undesirable scale in surface equipment, wells and related
equipment and/or
facilities.
31. The use of a synthetic acid composition according to any one of claims
1 to 22 in the oil
industry to fracture wells.
32. The use of a synthetic acid composition according to any one of claims
1 to 22 in the oil
industry to complete matrix stimulations.

-16-


33. The use of a synthetic acid composition according to any one of claims
1 to 22 in the oil
industry to conduct annular and bullhead squeezes & soaks.
34. The use of a synthetic acid composition according to any one of claims
1 to 22 in the oil
industry to pickle tubing, pipe and/or coiled tubing.
35. The use of a synthetic acid composition according to any one of claims
1 to 22 in the oil
industry to increase effective permeability of formations.
36. The use of a synthetic acid composition according to any one of claims
1 to 22 in the oil
industry to reduce or remove wellbore damage.
37. The use of a synthetic acid composition according to any one of claims
1 to 22 in the oil
industry to clean perforations.
38. The use of a synthetic acid composition according to any one of claims
1 to 22 in the oil
industry to solubilize limestone, dolomite, calcite and combinations thereof.

-17-


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Admin Status

Title Date
(86) PCT Filing Date 2015-09-29
(87) PCT Publication Date 2016-04-07
(85) National Entry 2017-03-20
Examination Requested 2017-03-20

Maintenance Fee

Description Date Amount
Last Payment 2017-04-26 $100.00
Next Payment if small entity fee 2018-10-01 $50.00
Next Payment if standard fee 2018-10-01 $100.00

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Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Request for Examination $200.00 2017-03-20
Registration of Documents $100.00 2017-03-20
Filing $400.00 2017-03-20
Maintenance Fee - Application - New Act 2 2017-09-29 $100.00 2017-04-26

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Abstract 2017-03-20 1 50
Claims 2017-03-20 4 123
Description 2017-03-20 13 677
International Search Report 2017-03-20 2 78
National Entry Request 2017-03-20 9 266
Special Order - Green Granted 2017-04-03 1 46
R30(2) Examiner Requisition 2017-04-21 5 254
Cover Page 2017-05-02 1 29
Amendment 2017-07-18 18 731
Abstract 2017-07-18 1 5
Claims 2017-07-18 4 108
Description 2017-07-18 14 645
R30(2) Examiner Requisition 2017-08-02 4 238
Interview Record with Cover Letter Registered 2017-08-31 1 13
Amendment 2017-10-19 10 379
Claims 2017-10-19 4 106
R30(2) Examiner Requisition 2017-11-07 3 140